PET is polyethylene terephthalate, bai is non-toxic, tasteless, and has good hygiene and safety. It can be directly used for food packaging.
PET is prepared by transesterification of dimethyl terephthalate and ethylene glycol or esterification of terephthalic acid and ethylene glycol to synthesize bishydroxyethyl terephthalate and then polycondensation reaction. It is a crystalline saturated polyester, a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface. It is a common resin in life, which can be divided into APET, RPET and PETG.
Performance of pet:
1. The heat distortion temperature and long-term use temperature are the highest among thermoplastic general engineering plastics
2. Because of its high heat resistance, the reinforced PET is immersed in a solder bath at 250°C for 10S, almost no deformation or discoloration. It is especially suitable for the preparation of electronic and electrical parts for soldering.
3. The bending strength is 200MPa, the elastic modulus is 4000MPa, the creep and fatigue resistance are also very good, the surface hardness is high, and the mechanical properties are similar to thermosetting plastics.
4. Since the ethylene glycol used in the production of PET is almost half the price of the butylene glycol used in the production of PBT, PET resin and reinforced PET are the cheapest among engineering plastics and have a high cost performance.
Post time: Sep-15-2020